Re: [erlang-bugs] beam core file R17
Matthew Evans <[email protected]> Sun, 29 May 2016 12:04:16 -0400
| Newsgroups | gmane.comp.lang.erlang.general,gmane.comp.lang.erlang.bugs |
|---|---|
| Message-ID | <[email protected]> |
Thanks, this software does use nifs Sent from my iPhone > On May 29, 2016, at 11:56 AM, Mikael Pettersson <[email protected]> wrote: > > Matthew Evans writes: >> Hi, >> This core was found on a live system (R17): >> >> >> >> >> >> >> >> >> 10:16:38:# erl >> Erlang/OTP 17 [erts-6.2] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] >> >> >> Eshell V6.2 (abort with ^G) >> 1> >> >> ........ >> >> >> >> >> >> >> >> >> May 28 22:18:56 [info ] plexxi kernel: [1235119.885465] beam.smp[2267] general protection ip:4b698a sp:7faeb6a7d650 error:0 in beam.smp[400000+1ac000] >> warning: Can't read pathname for load map: Input/output error.[Thread debugging using libthread_db enabled]Using host libthread_db library "/lib/libthread_db.so.1".Core was generated by `/usr/lib/erlang/erts-6.2/bin/beam.smp -K true -A 24 -P 350000 -- -root /usr/lib'.Program terminated with signal 11, Segmentation fault.#0 0x00000000004b698a in sweep_off_heap ()(gdb) bt#0 0x00000000004b698a in sweep_off_heap ()#1 0x00000000004b77d1 in do_minor ()#2 0x00000000004b8479 in erts_garbage_collect ()#3 0x00000000004e1374 in process_main ()#4 0x000000000048071d in sched_thread_func ()#5 0x0000000000549f89 in thr_wrapper ()#6 0x00007faeba32ba30 in start_thread () from /lib/libpthread.so.0#7 0x00007faeb9e8a53d in clone () from /lib/libc.so.6 > > It looks like your beam.smp binary lacks debugging information, so we only know the general > area where it crashed (sweep_off_heap() as called from do_minor()). Crashes here would usually > be due to memory corruption, which could be caused by: > - a bug in the VM > - a bug in a NIF > - a bug in HiPE > - a bug in the C compiler used to compile the VM (I've seen that happen at least 3 times) > - a HW error (though you'd then also find e.g. machine check events logged) > > If you want to debug this, you should first ensure that your beam.smp gets built and installed > with full debugging information (just attach gdb, bt, and list to verify). You should also try > without NIFs or native code, if those are used and you can configure them not to be.